The Effects of Iraq Natural Asphalt on Mechanical Properties of Bituminous Hot Mixtures

IF 0.8 4区工程技术 Q4 ENGINEERING, CIVIL

Teknik Dergi Pub Date : 2020-09-28 DOI:10.18400/tekderg.664187

Yunus Erkuş, B. Kök, M. Yılmaz

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引用次数: 2

Abstract

The increasing rate of traffic every day requires the roads to be made more stable. In order to improve the low and high temperature properties of the bituminous mixtures forming the coating layer of the flexible pavements, the binder in the mixture is often modified with various polymers. The most commonly used polymer in the modification is styrenebutadiene-styrene (SBS). However, SBS, which is very successful in improving the mechanical properties of the mixtures, is expensive and has brought the search for cheaper alternative additives. In this context, natural asphalts (NA) which are not subjected to any processes are used as additive. In this study, natural asphalt obtained from Zaho region of Iraq was used in 20%, 35% and 50% of bitumen modification by weight. The mechanical properties of mixtures prepared with different amount of NA modified bitumen were compared with 4% SBS modified bituminous mixtures. As a result, NA modification significantly improved the properties of bituminous mixtures. In particular, above 35% NA, the mixtures exhibited a superior performance by significantly resisting the effect of repeated loads. It was found that an average of 17.3% NA modification exhibited similar behavior with 4% SBS modification and provided significant economic savings.

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伊拉克天然沥青对沥青热混合料力学性能的影响

日益增长的交通流量要求道路更加稳定。为了改善构成柔性路面涂覆层的沥青混合料的低温和高温性能，通常用各种聚合物对混合料中的粘结剂进行改性。改性中最常用的聚合物是苯乙烯丁二烯-苯乙烯(SBS)。然而，SBS在改善混合物的机械性能方面非常成功，但价格昂贵，因此需要寻找更便宜的替代添加剂。在这种情况下，天然沥青(NA)，不受任何工艺被用作添加剂。在本研究中，从伊拉克Zaho地区获得的天然沥青被用于20%，35%和50%的沥青改性重量。比较了不同掺量的NA改性沥青与4% SBS改性沥青混合料的力学性能。结果表明，NA改性显著改善了沥青混合料的性能。特别是在35% NA以上，混合物表现出优异的性能，显著抵抗重复载荷的影响。结果表明，平均17.3%的NA改性与4%的SBS改性表现出相似的行为，并提供了显著的经济节约。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Teknik Dergi 工程技术-工程：土木

自引率

30.80%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Teknik Dergi is naturally confined with the subjects falling in the area of civil engineering. However, the area of civil engineering has recently been significantly enlarged, even the definition of civil engineering has somewhat changed. Half a century ago, engineering was simply defined as “the art of using and converting the natural resources for the benefit of the mankind”. Today, the same objective is expected to be realised (i) by complying with the desire and expectations of the people concerned and (ii) without wasting the resources and within the sustainability principles. This change has required an interaction between engineering and social and administrative sciences. Some subjects at the borderline between civil engineering and social and administrative sciences have consequently been included in the area of civil engineering. Teknik Dergi defines its scope in line with this understanding. However, it requires the papers falling in the borderline to have a significant component of civil engineering.